And why ? How is it going to improve your quality of life? Do you seriously believe for just one example that the loss of access to the Privy Council has improved the judiciary and legal system?
If it aint broke why fix it.
I feel very comforted to know in the Governor General that there is someone who has the power to dropkick a government back to the polls if we should ever get saddled with some extreme loser party controlling things. History proves it can happen.

Where's the poll then?, I'd like to add my voice for getting rid of the irrelevant monarchy, I suppose it gives old woman with tea spoon and tea towel collections something to do but doesn't do anything good for us in this day and age.

You're all asking/answering the wrong question. The question should be - what form of Government should NZ have?
We have a unicameral parliament, with a mainly figurehead Head of State (a Queen, as represented by a Governor-General) with several reserve powers, including the one to dissolve parliament - last used some decades ago in Australia.
Australia and its States, and the UK, all have bi-cameral parliaments with a mainly figurehead Head of State, th Prime Minister having all the power.
The USA and all its States have bi-cameral parliaments, but with a powerful President, or Governor as their Head of State.
Fiji and other countries have a President as Head of State, but the Prime Minister has all the power. Tonga has a King
Malaysia has several hereditary rulers, who take turns being the supreme ruler, but the Prime Minister has most of the power.
First decide the shape we need, THEN decide whether the Head of State should be a Monarch or a President.
And has for the ensign - Australia copied us, so let them change